“1772 Gagarin”的意思、由来-开放百科全书

In February 1984, a rotational lightcurve of Gagarin obtained by American astronomer Richard P. Binzel gave a rotation period of 10.96 hours with a brightness variation of 0.24 magnitude ({{small|U=2}}).^[11] Photometric observations at the Californian Palomar Transient Factory in December 2011, gave a 10.9430 hours with an amplitude of 0.41 ({{small|U=2}}).^[10] in 2001 and 2016, additional lightcurve were obtained from modeled photometric data, giving a period of 10.94130 and 10.93791 hours ({{small|U=n.a.}}).^[8]^[9]

Diameter and albedo

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Gagarin measures between 8.83 and 9.63 kilometers in diameter, and its surface has an albedo between 0.138 and 0.164,^[6]^[7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo of 0.20 and derives a diameter of 8.00 kilometers with an absolute magnitude of 12.85.^[3]

Naming

This minor planet was named for Russian–Soviet cosmonaut Yuri Gagarin (1934–1968), Hero of the Soviet Union and first human to journey into outer space by circumnavigating Earth in 1961. Gagarin died in a jet fighter crash in 1968, the year the asteroid was discovered. The lunar crater Gagarin is also named in his honor.^[2] The official naming citation was published by the Minor Planet Center before November 1977 ({{small|M.P.C. 3185}}).^[37]

References

1. ^¹²³{{cite book |title = Dictionary of Minor Planet Names – (1772) Gagarin |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 142 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1773 |chapter = (1772) Gagarin }}
2. ^¹²{{cite web |title = 1772 Gagarin (1968 CB) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1772 |accessdate = 20 December 2016}}
3. ^¹{{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 20 December 2016}}
4. ^¹²³⁴⁵⁶{{cite web |title = LCDB Data for (1772) Gagarin |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1772%7CGagarin |accessdate = 20 December 2016}}
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词条	1772 Gagarin
释义	Orbit and classification Physical characteristics Rotation period Diameter and albedo Naming References External links {{Infobox planet \| minorplanet = yes \| name = 1772 Gagarin \| background = #D6D6D6 \| image = \| image_size = \| caption = \| discovery_ref = \| discovered = 6 February 1968 \| discoverer = L. Chernykh \| discovery_site = {{nowrap\|Crimean Astrophysical Obs.}} \| mpc_name = (1772) Gagarin \| alt_names = 1968 CB{{·}}1940 GA 1942 VZ{{·}}1948 ET 1960 FH{{·}}1969 OO \| named_after = Yuri Gagarin {{small\|(cosmonaut)}}^[2] \| mp_category = main-belt{{·}}{{small\|(middle)}} ^[3] \| orbit_ref = \| epoch = 4 September 2017 (JD 2458000.5) \| uncertainty = 0 \| observation_arc = 76.21 yr (27,835 days) \| aphelion = 2.7924 AU \| perihelion = 2.2610 AU \| semimajor = 2.5267 AU \| eccentricity = 0.1051 \| period = 4.02 yr (1,467 days) \| mean_anomaly = 90.345° \| mean_motion = {{Deg2DMS\|0.2454\|sup=ms}} / day \| inclination = 5.7423° \| asc_node = 88.181° \| arg_peri = 93.442° \| dimensions = 8.00 km {{small\|(derived)}}^[3] {{val\|8.838\|0.644}}^[6] {{val\|9.634\|0.105}} km^[7] \| rotation = {{val\|10.93791\|0.00005}} h^[8] {{val\|10.94130\|0.00005}} h^[9] {{val\|10.9430\|0.0049}} h^[10] {{val\|10.96}} h^[11] \| albedo = {{val\|0.1380\|0.0085}}^[7] {{val\|0.164\|0.039}}^[6] 0.20 {{small\|(assumed)}}^[3] \| spectral_type = L ^[15]{{·}}S ^[3] B–V = 0.920 \| abs_magnitude = {{val\|12.626\|0.002}} {{small\|(R)}}^[10]{{·}}12.7{{·}}{{val\|12.80\|0.45}}^[15]{{·}}12.85^[3]^[11]^[7] }} 1772 Gagarin, provisional designation {{mp\|1968 CB}}, is a stony asteroid from the central region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 6 February 1968, by Russian astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.^[24] The asteroid was named after cosmonaut Yuri Gagarin.^[2] Orbit and classification Gagarin orbits the Sun in the central main-belt at a distance of 2.3–2.8 AU once every 4.02 years (1,467 days). Its orbit has an eccentricity of 0.11 and an inclination of 6° with respect to the ecliptic. Gagarin first observation is a precovery that was taken at Turku Observatory in 1940, extending the body's observation arc by 28 years prior to its official discovery observation.^[24] Physical characteristics Gagarin has been characterized as a rare L-type asteroid by PanSTARRS{{'}} photometric survey.^[15] Rotation period In February 1984, a rotational lightcurve of Gagarin obtained by American astronomer Richard P. Binzel gave a rotation period of 10.96 hours with a brightness variation of 0.24 magnitude ({{small\|U=2}}).^[11] Photometric observations at the Californian Palomar Transient Factory in December 2011, gave a 10.9430 hours with an amplitude of 0.41 ({{small\|U=2}}).^[10] in 2001 and 2016, additional lightcurve were obtained from modeled photometric data, giving a period of 10.94130 and 10.93791 hours ({{small\|U=n.a.}}).^[8]^[9] Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Gagarin measures between 8.83 and 9.63 kilometers in diameter, and its surface has an albedo between 0.138 and 0.164,^[6]^[7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo of 0.20 and derives a diameter of 8.00 kilometers with an absolute magnitude of 12.85.^[3] Naming This minor planet was named for Russian–Soviet cosmonaut Yuri Gagarin (1934–1968), Hero of the Soviet Union and first human to journey into outer space by circumnavigating Earth in 1961. Gagarin died in a jet fighter crash in 1968, the year the asteroid was discovered. The lunar crater Gagarin is also named in his honor.^[2] The official naming citation was published by the Minor Planet Center before November 1977 ({{small\|M.P.C. 3185}}).^[37] References 1. ^¹²³{{cite book \|title = Dictionary of Minor Planet Names – (1772) Gagarin \|last = Schmadel \| first = Lutz D. \|publisher = Springer Berlin Heidelberg \|page = 142 \|date = 2007 \|isbn = 978-3-540-00238-3 \|doi = 10.1007/978-3-540-29925-7_1773 \|chapter = (1772) Gagarin }} 2. ^¹²{{cite web \|title = 1772 Gagarin (1968 CB) \|work = Minor Planet Center \|url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1772 \|accessdate = 20 December 2016}} 3. ^¹{{cite web \|title = MPC/MPO/MPS Archive \|work = Minor Planet Center \|url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html \|accessdate = 20 December 2016}} 4. ^¹²³⁴⁵⁶{{cite web \|title = LCDB Data for (1772) Gagarin \|publisher = Asteroid Lightcurve Database (LCDB) \|url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1772%7CGagarin \|accessdate = 20 December 2016}} 5. ^¹²³⁴{{cite journal \|display-authors = 6 \|first1 = A. \|last1 = Mainzer \|first2 = T. \|last2 = Grav \|first3 = J. \|last3 = Masiero \|first4 = E. \|last4 = Hand \|first5 = J. \|last5 = Bauer \|first6 = D. \|last6 = Tholen \|first7 = R. S. \|last7 = McMillan \|first8 = T. \|last8 = Spahr \|first9 = R. M. \|last9 = Cutri \|first10 = E. \|last10 = Wright \|first11 = J. \|last11 = Watkins \|first12 = W. \|last12 = Mo \|first13 = C. \|last13 = Maleszewski \|date = November 2011 \|title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results \|journal = The Astrophysical Journal \|volume = 741 \|issue = 2 \|page = 25 \|bibcode = 2011ApJ...741...90M \|doi = 10.1088/0004-637X/741/2/90 \|arxiv = 1109.6407 }} 6. ^¹²³{{Cite journal \|author = Binzel, R. P. \|date = October 1987 \|title = A photoelectric survey of 130 asteroids \|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987Icar...72..135B \|journal = Icarus \|volume = 72 \|issue = 1 \|pages = 135–208 \|issn = 0019-1035 \|bibcode = 1987Icar...72..135B \|doi = 10.1016/0019-1035(87)90125-4 \|access-date= 20 December 2016}} 7. ^¹²{{cite journal \|display-authors = 6 \|author = Hanus, J. \|author2 = Durech, J. \|author3 = Broz, M. \|author4 = Warner, B. D. \|author5 = Pilcher, F. \|author6 = Stephens, R. \|author7 = Oey, J. \|author8 = Bernasconi, L. \|author9 = Casulli, S. \|author10 = Behrend, R. \|author11 = Polishook, D. \|author12 = Henych, T. \|author13 = Lehký, M. \|author14 = Yoshida, F. \|author15 = Ito, T. \|date = June 2011 \|title = A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method \|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011A&A...530A.134H \|journal = Astronomy & Astrophysics \|volume = 530 \|pages = 16 \|bibcode = 2011A&A...530A.134H \|doi = 10.1051/0004-6361/201116738 \|arxiv = 1104.4114 \|access-date= 20 December 2016}} 8. ^¹²{{Cite journal \|display-authors = 6 \|first1 = J. \|last1 = Hanus \|first2 = J. \|last2 = Durech \|first3 = D. 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Orbit and classification

Physical characteristics

Rotation period

Diameter and albedo

Naming

References

External links